Add Morne Alberts to authors

Significant work on the Bootstrap 5 upgrade. Mirrors how Chameleon credits the same contributor in skin.json.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: malberts

extension.json

@@ -4,7 +4,8 @@
 	"author": [
 		"[https://www.mediawiki.org/wiki/User:F.trott Stephan Gambke]",
 		"[https://professional.wiki/ Professional Wiki]",
-		"James Hong Kong"
+		"James Hong Kong",
+		"Morne Alberts"
 	],
 	"version": "6.0.0",
 	"url": "https://www.mediawiki.org/wiki/Extension:Bootstrap",